smith



(NoModel.) J. R. SMITH.

l MIDDLINGS PURIPIER. No. 271,932. Patented Feb. 6, 1883.

i UNITED STATES PATENT Orman.

JOHN R. SMITH, OF ROCHESTER, NEW YORK.

MIDDLINGS-PURIFIER.

SPECIFICATION forming part of Letters Patent No. 271,932, dated February 6, 1883.

Application filed June 12,1882. (No model.)

vention, such as will enable others skilled in the art to which it appertains to make and use the same,`reference being had to the accom panying drawings.

The object of this invention is to improve the machines known as middlings-purifiers 7 and it consist-s in such construction of parts th at the middlings-granules, after passing through the shaker-bolt, will of themselves keep the meshes of the cloth clear without the aid of a brush, roller, or jarring device, as will be fully hereinafter described.

In the drawings, Figure lrepresents abroken side view ofthe half-length of a middlings-purifier, from the top of the shaker-frame down, to include the showing of the devices which clean the cloth and the means for operating such devices. Fig. 2 represents a top plan view of the cleaning devices, and Fig. 3 represents a broken transverse view of Fig. l.

The framing `and casing that supports and surrounds the improvement is not shown in the drawings or described in this specication, as the devices of this improvement can be placed underneath any of the well-known machines for purifying middlings where a shaking-bolt is used. y

A represents the broken side of a shakerframe, constructed and hung in the machine in the usual way, having the bolt-cloth A secured to its under side.

B B are transverse, horizontal, and reciprocating carriers of middlings-granules, having a concave groove, b, longitudinallyr in their top edges, which do not at any time extend high enough to touch the bolt-cloth A. The carriers B are rigidly secured in position by the cross-braces b' b and longitudinal'reach b.

C C' are transverse shafts, freely revolving in proper bearings, secured to the sides of the machine by brackets C or by other well-known means. Shaft C is located at or near the center ofthe length of the machine, and extends entirely across the machine and outside thereof at one or both sides, so as to attach a driving pulley or pulleys to revolve the shaft from any convenient revolving pulley or from any power to revolve it. Shafts C are short shafts,

located near to one end of the machiue,`and '55 to revolve in proper bearings upon or attached to brackets C", as seen in Fig.` 3.

D D are pairs of sprocket-wheels fast upon the shafts O and C', eqnidistant from the longtudinal centers of the carriers B. 6o

Dl D are endless chains around the sprocketwheels D, the open links of which take over the projecting teeth on the said sprocket-wheels, and are made to travel in the direction shown by the arrows in Fig. 1.

d is a metal rod, secured at each of its ends to the endless chains D and at right angles. thereto.

E is a downwardly-'projecting lug` from the longitudinal brace or reach b, or to any other 7o convenient part of `the reciprocating frame which actuates the carriers B, and extends down so as to always reciprocate over the shaft C without touching it. E is another downwardly-projectin g lug, located in the rear of E 7 5 and at the end of the frame which reciprocates the carriers B, proj ect-ing down below the lower line of the under peripheries of the sprocketwheels D, as seen in Fig. l.

The frame that supports and keeps the car- 8o rers B in their parallel relation must oe suficiently strong to prevent any displacement of.parts, so as to bind, and vet be light, so as to prevent friction as much as is possible, as

the carriers B at each end have a groove, j', 85

therein to slide on guideways F, that are secured to thesides of the machine; hence the necessity for keeping thc carriers perfectly parallel at all times.

This improvement constructed as described 9o and placed at the proper distance below the rcciprocating shaker of a middlings-puriier, motion being applied to shaft C, and the sprocketwheels put in revolution, causing the endless chains to travel in the direction shown by ar- 9 5 rows, the cross-bar d engages the lug E and forces it forward, carrying with it the granules-carriers B, forcing the lug E beyond the d lsprocket-wheels on shaft G, or so that the barm d, will pass around the sprockets, leaving the rco 2 f arnese jectin g lug, E', that has passed between the two short shafts C C', and thereby forces the carriers B back to the position that they started from, as seen in Fig. l. The shaft C and its sprocket-wheels being at or near to the center ofthe length ofthe machine, and the carriers shown to reach but about half the length, ,vet when the carriers B are reciprocated the full extent of their throw the carrier, which is seen over shaft C in Fig. I, will be forced forward to the extreme end of the bolt-cloth on the shaker. Thus the whole length of the boltcloth will be traversed by the carriers, although but about half the length of the bolt-cloth is shown. As the carriers B reciprocate underneath and outfof contact with the bolt-cloth A', and are of considerable width on their top surfaces and made concave, the middlings wh which pass through the bolt-cloth A', will fall into the concave grooves b, and pile up until they reach the boltcloth on the shaker-frame, and when the granules of middlings are in contact lwith the cloth and the carriers in reciprocation back and forward they present nothing but the loose and unconned granules of middlings against the under side of the boltcloth, and this action will cause the granules to roll and tumble about in contact with the bers of the bolt-cloth, which action will keep the meshes ofthe cloth open, and at the same time the cloth keeps the granules of middlin gs from too great accumulation in the concaves of the carriers, so that both the boltcloth and out perceptible wea-r upon the cloth, and is of 4o advantage to the middlings, as the friction obtained upon the granules of middlings forces off all the fine adhering dust of flour not before removed.

In this application I have not described any of the operations of amiddlings-puriier except such parts as Iclaim as my invention, andIpropose to connect such described improvements with or to any ordinary middlings-puricr.

I claim- 1. The combination, with the bolt-cloth A of the shaker of a middlings-purier, of the reciprocating granules-carrier B, having a concave groove in its top surface and means to reciprocate it, substantially as and for the purposes described.

2. In a machine, as above described, the combination, with the bolt-cloth of'a shaker, of devices by which the bolt-cloth of the shaker is kept clean by the action of the granules of middlings after passing through the cloth and in contact therewith, substantially as described.

JOHN R. SMITH. Witnesses:

A. H. KIRK, GEO. B. SELDEN. 

